Power-press.



No. 862,391; PATENTBD AUG. 6, 1907f 11,11. HAMLETT.

7 POWER PRESS. APPLIU-ATION FILED DEC. 31. 190

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No. 862,391. PATENTED AUG..6, 1907.

H. H. HAMLETT.

POWER PRESS.

APPLIOATION FILED DEC. 31, 1906.

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No 862,391. PATENTED AUG. 6, 1907. H. H. HAMLETT.

POWER PRESS.

ABPLIOATION FILED DEC. 31, 1906.

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No 862,391. PATENTED AUG. 6, 1907.

' H. H. HAMLETT.

' POWER PRESS.

APPLICATION FILED D30; 31, 1906.

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ATTDRNEY.

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HENRY H. HAMLETT, OF SALEM, MASSACHUSETTS.

POWER-PRESS.

Specification of Letters Patent.

Patented Aug. 6, 1907.

Application filed December 31,1906. Serial No. 350,108.

To all whom it may concern:

Be it known that I, HENRY H. HAMLETT, a citizen of the United States,and a resident of Salem, in the State of Massachusetts, have invented anew and useful Improvement in Power-Presses, of which the following is aspecification.

The nature of my invention consists in the improved construction andarrangement of parts whereby a safe and conveniently operated press isproduced, as hereinafter set forth.

In the accompanying drawings, Figure 1 represents a side elevation of myimproved power press. Fig. 2 represents the opposite side view. Fig. 3represents a front view. Fig. 4 represents a rear view. Fig. 5represents a top view. Fig. 6 represents a vertical section taken 1 inthe line 6 6 of Fig. 5. Fig. 7 represents an enlarged detail view of theclutch operating mechanism when the plunger of the press is in its lowerposition. Fig. 8 represents the same when the plunger of the press is inits upper position. Fig. 9 represents a detail top view of the clutchoperating mechanism.

In the drawings, A represents the frame of the press, B the die, and Othe plunger which projects from the plunger slide D held in the frame A,and actuated in the downward direction by means of the spiral spring E,held in the longitudinal perforation F. The spring E is attached at itslower end to the fixed eye G, and at its upper end to the cap H, whichis secured to the end of the said plunger slide D, and the rear side ofthe said plunger slide is provided with the notch I. At the back of theplunger slide D is placed the sliding catchbar J, provided with thepivoted catch K, which has its upper end pressed forward by means of thespiral spring L, and to the frame A at the back of the sliding catch-barJ is placed the catch-deflector W, pivoted to the frame A at the pointM, and actuated for adjustment at its lower end by means of the screw N,the said doflector being provided with the incline O, which upon theupward movement of the sliding catch-bar .I, will cause thedisengagement of the catch K from the notch I of the plunger slide, thusallowing the action of the spring E to cause the rapid downward movementof the said plunger slide; and the outward or inward adjustment of thecatch-deflector W, will serve to either increase or decrease the strokeof the plunger slide. The catch-bar J is operated by means of the crankA and connecting rod B the said crank being formed on the shaft G whichis operated from the driving shaft D by means of the pinion E and gear Fand upon the opposite end of the shaft C from the gear F is secured theratchet wheel G which is acted upon to prevent the backward rotation ofthe shaft G by means of the pawl 11, which latter is pivoted to theframe A of the machine at the point a.

The gear F is loose upon the shaft 0 the said shaft being caused torevolve by the engagement of the teeth b of the sliding clutch member Iwith the loose clutch member 0 at the hub of the gear F The slidingclutch member I may be operated for disengagement either by means of thehand lever J which is pivoted to a bracket on the frame of the press, atthe point d, and connected with the yoke M of the said clutch-member atthe joint 6, or by means of the poweractuated lever K which is pivotedto a bracket on the said frame at the point f. The lever K passesloosely through a slot g, made in the end portion of the sliding bar Lwhich is rigidly connected with the yoke M of the sliding clutch-member.The lever K is connected by means of the links N with the bell-cranklever 0 which lever is pivoted at the point It to a plate P of theframe, and the outer end of the said bell-crank lever is held inposition for movement along the side of the said frame plate, by meansof the guide bar Q Upon the pin 71, to which the connecting rod B isjointed, is loosely placed the pendent hook R provided with the notch jadapted for engagement with the pin 70 at the outer end of thebell-crank lever 0 as shown in Fig. 8, the curved form of the lower endof the said hook serving to cause it to swing automatically into theposition for engagement.

At the side of the machine is journaled the hand operated arm Z, by themovement of which the pendent hook B may be forced out of its engagementwith the pin it, and then the said-bell-crank lever will drop to theposition shown in Fig. 7, in which position the members of the drivingclutch may by means of the hand lever J be forced into engagement tocause the operation of the machine, and in this case upon the rotationof the crank A and the consequent downward and subsequent upwardmovement of the catch-slide J, the notch j of the pendent hook R willengage with the pin k of the bell-crank lever O to cause the gradualdisengagement of the members of the driving clutch, with the resultingstoppage of the operation of the machine at the completion of a singlerevolution, the automatic spring actuated operation of the press plungerhaving in the meantime been effected. And at this time the press will besecurely locked against the subsequent accidental engagement of themembers of the clutch, and the press can only be started into operationafter the hook R has been disengaged from the pin 70, by the purposedinward movement of the arm I by the operator of the machine. But suchdisengagement and subsequent downward movement of the engaging arm ofthe bell-crank lever 0 will not serve to cause the engagement of thedriving clutch members, for there is left in the mechanism a sufiicientamount of backlash at the links N and at the slot 9, to allow for suchdownward movement without affecting the clutch, thus leaving the clutchmembers to be actuated into cngagement'by the hand oi the operator uponthe lever P.

To the upper side o, of the bell-crank lever 0 is attached the spring m,which engages with the stop n,

the crank shaft and connection between the crank shaft and thereciprocating eateh bar, for imparting reciprocating movement to thesaid catch-bar, the driven clutch member, the sliding clutch-member, thebellcrank lever connected with the said member and provided with theengaging pin, the pendent hook loosely connected with the slidingcatch-bar and adapted for engagement with the pin of the bell-cranklever, to hold the sliding clutch memher out of engagement with itsopposite driven member at the completion of a single revolution of thecrank-shaft.

2. The combination of the crank-shaft, the plunger slide, thereciprocating catch-bar and the catch, the driven clutch member. thesliding clutch-member, the bell-crank lever connected with the saidsliding clutch member and provided with the engaging pin, the pendenthook loosely connected with the reciprocating catch-bar and adapted forengagement with the pin or the bell-crank lever to hold the slidingclutch member out of engagement with the opposite clutch member at thecompletion of a single revolution of the cranleshatt, and the handoperated arm for mentwith the plunger slide, and the catch deflectorwith causing the disengagement of the pendent hook from the pin of thebell-crank lever.

The combination of the crankshaft, the plunger slide, the reciprocatingcatch-bar, and the catch,'thedriven clutch member, the slidingclutch-membcr, the belhcrank lever connected with the said slidingclutclrmember and provided with the engaging pin, the pendent hookloosely connected with the reciprocating catch-bar and adapted forengagement with the pin of the bell-crank lever, to hold the slidingclutclrmemberout of engagement with the pin of'the bell-erank lever'atthe completion of a single revo lution of the crank-shaft, the handoperated arm for causing the disengagement of the pendent hook from thepin or the bell-crank lever. and the hand lever for operating; thesliding clutelrmember into engagementupon the re lease of the pin of thebell-crank lever from the notch of the hook.

4. The combination of the crank-shaft, the plunger slide, thereciprocating ca't'ch bar, and the catch, the driven clutch member, thesliding clutch-member. the bell-crank lever connected with the saidsliding cluteh member and provided with the engaging pin,the pendenthook loosely connected with the reciprocating catch-bar and, adapted forengagement with the pin of the bell-crank lever, to carry the slidingclutch-member out of engagement with the driven clutch-member at thecompletion of a single revolution Of lllt) crank-shaft, and the springand stop for limiting the upward movement of the arm of the bell-cranklever. I

HENRY n. H AM LETT.

Witnesses Socm'rns ScnoLrInLn. Cmnrmcn Lv BlGl-lLOW.

